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WO2000025435A3 - Method for controlling memory access in rake receivers with early-late tracking - Google Patents

Method for controlling memory access in rake receivers with early-late tracking Download PDF

Info

Publication number
WO2000025435A3
WO2000025435A3 PCT/DE1999/003430 DE9903430W WO0025435A3 WO 2000025435 A3 WO2000025435 A3 WO 2000025435A3 DE 9903430 W DE9903430 W DE 9903430W WO 0025435 A3 WO0025435 A3 WO 0025435A3
Authority
WO
WIPO (PCT)
Prior art keywords
early
late
late tracking
memory access
finger
Prior art date
Application number
PCT/DE1999/003430
Other languages
German (de)
French (fr)
Other versions
WO2000025435A2 (en
Inventor
Andreas Falkenberg
Reinhold Braam
Ulf Niemeyer
Christoph Rohe
Oskar Skuk
Original Assignee
Siemens Ag
Andreas Falkenberg
Reinhold Braam
Ulf Niemeyer
Christoph Rohe
Oskar Skuk
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag, Andreas Falkenberg, Reinhold Braam, Ulf Niemeyer, Christoph Rohe, Oskar Skuk filed Critical Siemens Ag
Priority to US09/830,624 priority Critical patent/US7054351B1/en
Priority to EP99960827A priority patent/EP1133834B1/en
Priority to DE59912436T priority patent/DE59912436D1/en
Priority to JP2000578917A priority patent/JP3795756B2/en
Publication of WO2000025435A2 publication Critical patent/WO2000025435A2/en
Publication of WO2000025435A3 publication Critical patent/WO2000025435A3/en
Priority to HK02108069.7A priority patent/HK1046596A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The aim of the invention is to reduce the number of memory accesses in RAKE receivers with early-late tracking in telecommunications systems operated by wireless telecommunication between mobile and/or stationary transmitters/receivers, especially in third generation mobile radio systems. To this end, data received by the RAKE receiver which is read by an early finger in an early-late tracking step is stored temporarily and is transmitted to a late finger one read cycle later to be read by the late finger in an early-late tracking step.
PCT/DE1999/003430 1998-10-27 1999-10-27 Method for controlling memory access in rake receivers with early-late tracking WO2000025435A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US09/830,624 US7054351B1 (en) 1998-10-27 1999-10-27 Method for memory access control in rake receivers with early late tracking in telecommunication systems
EP99960827A EP1133834B1 (en) 1998-10-27 1999-10-27 Method for controlling memory access in rake receivers with early-late tracking in telecommunications systems
DE59912436T DE59912436D1 (en) 1998-10-27 1999-10-27 METHOD FOR CONTROLLING STORAGE ACCESS TO RAKE RECEIVERS WITH EARLY-LATE TRACKING IN TELECOMMUNICATIONS SYSTEMS
JP2000578917A JP3795756B2 (en) 1998-10-27 1999-10-27 Telecommunication system for wireless telecommunication between mobile stations and / or fixed transmitting / receiving stations, "RAKE" with "early / rate tracking"-method for controlling memory access at receiver
HK02108069.7A HK1046596A1 (en) 1998-10-27 2002-11-06 Method for controlling memory access in rake receivers with early-late tracking in telecommunications systems operated by wireless telecommunication between mobile and/or stationary transmitters/receivers, especially in third-generation mobile radio systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19849532 1998-10-27
DE19849532.3 1998-10-27

Publications (2)

Publication Number Publication Date
WO2000025435A2 WO2000025435A2 (en) 2000-05-04
WO2000025435A3 true WO2000025435A3 (en) 2000-10-12

Family

ID=7885817

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/003430 WO2000025435A2 (en) 1998-10-27 1999-10-27 Method for controlling memory access in rake receivers with early-late tracking

Country Status (8)

Country Link
US (1) US7054351B1 (en)
EP (1) EP1133834B1 (en)
JP (1) JP3795756B2 (en)
KR (1) KR100407523B1 (en)
CN (1) CN1350725A (en)
DE (1) DE59912436D1 (en)
HK (1) HK1046596A1 (en)
WO (1) WO2000025435A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001286414A1 (en) * 2000-07-31 2002-02-13 Morphics Technology, Inc. Apparatus and methods for sample selection and reuse of rake fingers in spread spectrum systems
JP2002290281A (en) * 2001-01-16 2002-10-04 Kawasaki Steel Corp Rake receiver
DE10123334A1 (en) * 2001-05-14 2002-12-05 Infineon Technologies Ag RAKE receiver for FDD and TDD mode
US7010060B2 (en) * 2003-01-10 2006-03-07 Cornell Research Foundation, Inc. Real-time software receiver
CN101645305B (en) * 2008-08-05 2013-03-27 辉达公司 Static random access memory (SRAM) for automatically tracking data
US8331421B2 (en) * 2009-08-18 2012-12-11 Broadcom Corporation Method and system for a delay-locked loop for closely spaced multipath
US9276778B2 (en) 2014-01-31 2016-03-01 Qualcomm Incorporated Instruction and method for fused rake-finger operation on a vector processor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2300545A (en) * 1995-05-03 1996-11-06 Motorola Ltd Processing binary phase-shift keyed signals
WO1997028608A1 (en) * 1996-02-02 1997-08-07 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement of signal tracking and a rake-receiver utilizing said arrangement
US5659573A (en) * 1994-10-04 1997-08-19 Motorola, Inc. Method and apparatus for coherent reception in a spread-spectrum receiver
US5799010A (en) * 1995-06-30 1998-08-25 Interdigital Technology Corporation Code division multiple access (CDMA) communication system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619524A (en) 1994-10-04 1997-04-08 Motorola, Inc. Method and apparatus for coherent communication reception in a spread-spectrum communication system
US5640416A (en) * 1995-06-07 1997-06-17 Comsat Corporation Digital downconverter/despreader for direct sequence spread spectrum communications system
US5764687A (en) * 1995-06-20 1998-06-09 Qualcomm Incorporated Mobile demodulator architecture for a spread spectrum multiple access communication system
US6163563A (en) * 1996-12-31 2000-12-19 Lucent Technologies Inc. Digital communication system for high-speed complex correlation
US5867525A (en) * 1997-06-10 1999-02-02 L-3 Commuications Corporation Synchronizer and method therefor and communications system incorporating same
US6078611A (en) * 1997-09-16 2000-06-20 Motorola, Inc. Rake receiver and finger management method for spread spectrum communication
US6639906B1 (en) * 1997-12-09 2003-10-28 Jeffrey A. Levin Multichannel demodulator
US6839378B1 (en) * 1998-01-12 2005-01-04 Ericsson, Inc. Method and apparatus for multipath delay estimation in direct sequence spread spectrum communication systems
US6269075B1 (en) * 1998-01-26 2001-07-31 Nokia Mobile Phones Limited Finger assignment in a CDMA rake receiver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5659573A (en) * 1994-10-04 1997-08-19 Motorola, Inc. Method and apparatus for coherent reception in a spread-spectrum receiver
GB2300545A (en) * 1995-05-03 1996-11-06 Motorola Ltd Processing binary phase-shift keyed signals
US5799010A (en) * 1995-06-30 1998-08-25 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
WO1997028608A1 (en) * 1996-02-02 1997-08-07 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement of signal tracking and a rake-receiver utilizing said arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE GAUDENZI R ET AL: "CHIP TIMING SYNCHRONIZATION IN AN ALL-DIGITAL BAND-LIMITED DS/SS MODEM", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON COMMUNICATIONS,US,NEW YORK, IEEE, 1991, pages 1688 - 1692, XP000277600, ISBN: 0-7803-0006-8 *

Also Published As

Publication number Publication date
DE59912436D1 (en) 2005-09-22
US7054351B1 (en) 2006-05-30
WO2000025435A2 (en) 2000-05-04
KR100407523B1 (en) 2003-11-28
CN1350725A (en) 2002-05-22
HK1046596A1 (en) 2003-01-17
JP2002528990A (en) 2002-09-03
KR20010082264A (en) 2001-08-29
JP3795756B2 (en) 2006-07-12
EP1133834B1 (en) 2005-08-17
EP1133834A2 (en) 2001-09-19

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